Engine-valve-setting gauge



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Patented Dec. 15, 1925.

UNITED STATES HARRY E. FORSLUND. OF i-i.

PATENT oFfFicE.

l.iro-tis, MINNESOTA.

ENGINE-VALvE-SETTING GAUGE.

Application vfiled January 5,` 1925.

To {(/l iii/(om 'it lmay collec/'nf lle it known that I,'Hiinur IC.FoiisLUNn, citi/.cn of the United States, residing at Minneapolis, inthe county of Hennepin and State of Minnesota, have invented certain newand useful Improvements in Engine- Valve-Setting Gauges; 'and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit ap pertains to make and use the same.

This invention relates to a device for properly adpistmg the opening andclosing position of the inlet and exhaust valves on 4over the engine andhaving a mark on `the liy wheel which would be alined `with the inark ona stationary part of the'engine. It is a great deal more convenient,especially if only one person is working onthe engine, to set'the valveopening and closing according 'to the position ofthe piston and AtheApiston is, of course, moved in definite relation to the revolution ofthe crank shaft or ,Si y wheel. p

t is an object o't'ithis invention, therefore, to provide a. very simpleand etlicient device, by means of which 'the setting of the valvecan beproperly made in relation to 'the position of the piston inthe cylinder.

l It is also an object of y'the invention to provide a device 'fordetermining the setting position of the intake and exhaust valves of aninternal combustion engine, which device is adapted to be placed in acylinder of said engine having a portion 'constructed and arranged toengage the top of a piston and a portion constructed and arrangedtoengage the top of the cylinder; said device also having an intermediateor side portion so arranged that the device can also be used todetermine a position of the valve when the top of the piston is abovethe top of the cylinder.

It is more specilically an object of the invention to provide such adevice comprising a member adapted to be placed in the engine Lvlinderhaving a plane surface or straight Serial No. 551.

edge adapted to engage the top of the piston and having indicationsthereon adapt-ed to be alined with the top oi' the cylinder when lthepiston is in proper position for the valves yto open or close.

These and other objects and advantages ofthe inventionwill be fully setforth in the following description made in connection with theaccompanying drawings, in which Fig. l is vertical section through acylinder showing the Lpiston therein and `part ofthe connecting rod andalso showing a Vview in side elevation of the device in use;

Fig. 2 is an edge view of the device; rand Fig. 3 is a view in sideelevation of the modified form of the invention.

Referring to the drawings, the cylinder 3 `Ot an internal combustionengine is shown,

in which is movable the piston 2l, shown having `the usual piston rings5 therein and as connected to the connecting rod 16. In accordance with'the present invention, the member 7 is shown adapted to be inserted inthe top of the cylinder. lhilethe device may be made in various shapes,in the einbodiinent of the invention illustrated, the same is shown asmade from a compara- "tively wide tlat plate'ha'ving a straight edge orplane end 7u at one'end, which end is adapted Ato engage 'the top of apiston. Member 7 has valso straight side edges at its angles to edge 7adapted to'tit against the inner side of the cylinder $3. The plate 7has marks or indications 7" and '7 thereon extending normal to its sideedges.

In the forni of the invention shown in Fig. 3 a'tiat plate 8 is usedwhich may be of the saine thickness as the plate 'T andthe plate S has abottom portion or straight 'edge 8 adapted to engage the top ofthepiston when the plateS is disposed intlie top of the cylinder. The plateS has side portions 8" and Hc disposed at right angles tothe bottomportion Si", the side portions 8" 'and Sc'being oll'set respectively toform the shoulder portions S and Se, which shoulder portions areparallel to the portion The length of the shoulder portions Sd and Se isalso determined for a certain type of engine as will be later described.

In operation of the device as shown in Figs. 1 and 2, when the valvesare to be set, member 7 will be inserted into the top of the cylinderwith the edge 7a in Contact with the top of the piston. The engine willthen be moved until the piston is in position to bring the gauge mark 71into alinement with the top of the cylinder or top of the cylinderblock, which is usually a flat surface. The mark 7" Will be so placedthat when the piston is in this position the intake valve should just bein closed position and the valve can be so set. The engine Will then bemoved to bring the piston into position with the mark 7 in alinementwith the top of the cylinder or cylinder block. lVhen the piston is inthis position, the exhaust valve should begin to open and this valve canbe so set. dVhen the valves are thus adjusted, they Will be in properrelation to the piston and the 'movements of the piston and valves Willbe properly synchronized.

In the use of the device as shown in Fig. 3, the member 8 will beinserted in the top of a cylinder of the engine with the portion 8a incontact With the top of the piston. The engine Will then be turned ormoved until the shoulder 8d comes into flat Contact With the top of acylinder or cylinder block. then the piston is in this position theintake valve Will be in closing position and the valve can be so set. Ifdesired, of course, the shoulder 8d may be first placed in contact Withthe top of a cylinder or cylinder block with the edge 8b' against theside of the cylinder, and the engine then turned until the top of thepiston engages the portion 8, at which time the intake valve can be setfor closing position. To set the exhaust valve for opening position theportion 8aL Will be placed in engagement With the top of the pistonWithin the cylinder and the engine moved until the shoulder' Se alsoengages the top of the cylinder or cylinder block. As before stated, theshoulder Se might first be placed in engagement With the top of acylinder or cylinder block and the engine moved until the top of thepiston engages the portion 8a, it being understood that the side Sishould be in contact with the Wall of the cylinder. lt is oftendesirable to also check the setting in the valves as to the opening ofthe intake valve and the closing of the exhaust valve. In most enginesthe top of the piston at this time is slightly above the iop of thecylinder. The member 8 is so arranged that if the portion Sc on the sidehaving the shoulder 8d is placed ilat against thc iop of the cylinder orcylinder block, the yportion S" on the same side Will .then just be inengagement with the top of the piston the correct closing position ofthe exhaust valve determined. By the use of member 8, therefore, thefour positions of the valves can be determined directly from the pistonand the valves can be set in a very convenient manner.

From the above description, it is seen that applicant has provided avery simple and eiicient device which Will have high utility indetermining the correct opening and closing positions of the intake andexhaust valves in relation to the position of the piston. The device isquite simple and can be easily and inexpensively produced. The same hasbeen used in actual practice and found to be very successful andefficient.

lVhat is claimed is:

A device for determining the setting of the intake and exhaust valves ofan internal combustion engine7 comprising a member adapted to be placedin a cylinder of said engine and having a straight bottom portionadapted to engage the top of the piston, said member having straightcomparatively long side portions extending at right angles to saidbottom portion and respectively having at each side shoulder portionsextending at right angles to said side portions, said shoulder portionsbeing disposed at different distances from said bottom portion, said.shoulders being adapted to engage the top of the cylinder block When thesaid bottom portion is in engagement with the top of the piston forrespectively determining the closing position of the intake valve andthe opening position of the exhaust valve, and the portions of said sideportions at each side of said shoulders being respectively adapted toengage the top of the cylinder and the top of the piston when the intakeand exhaust valves are respectively in opening and closing positions.

In testimony whereof I afl'ix my signature.

HARRY E. FORSLUND.

